In the District of North Vancouver, Canada 839 buildings are expected to collapse in an Magnitude M7.3 Earthquake ~ the Geological Survey of Canada and the District of North Vancouver, BC.
A Cascadia (M8.8~M9.0) Megaquake at 9PM on Tuesday, January 26, 1700, wiped out entire west coast First Nations villages. It dropped the North American west coast down 1~3 metres and moved it 20 metres to the south west, the latest in a series of 41 Big Earthquakes in the past 10,000 years. Click.
Volcanic evolution of the Pacific Northwest: 55 million year history
76,801 views • Aug 15, 2017 • OSU/IRIS Collaboration--Pacific Northwest Earth-science series.
Tectonics of the Pacific Northwest yield a varied volcanic history. The Pacific Northwest boasts an active volcanic arc (Cascades Range), a nearby ocean ridge (Pacific Plate-Juan de Fuca Plate spreading ridge), the world’s youngest flood basalt province (Columbia River Basalt), a hot-spot chain of eastward-younging volcanoes (Yellowstone Trend), volcanism related to continental extension, and more. It is a volcanological wonderland. The western margin of North America has long been dominated by subduction and dextral transtension. This animation attempts to simplify a complex tectonic interaction through cross sections.
This animation was created to accompany a Plenary talk at the 2017 IAVCEI meeting in Portland, OR.
Written and directed by Anita Grunder, Oregon State University
Graphics, animation, & narration by Jenda Johnson,Earth Sciences Animated
Reviewed by Ray Wells, U.S. Geological Survey
Love this video, awesome! As a lover of both Yellowstone and the Pacific NW, I am fascinated to see these geological connections so beautifully explained and demonstrated in this video. Until just recently, it had not occurred to me that the pivot point shown in this video was an actual thing - and then this video that explains the theory and puts it into clear perspective and context. Big thank you! Sharing wherever I can.
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